import random
import requests
from requests_toolbelt.multipart.encoder import MultipartEncoderurl = 'http://ip:port/email'
data = MultipartEncoder(fields={'receiverId': 'xxxx@163.com','mailSubject': 'mailSubject','content': 'content','fileList': ('file_name', open('/opt/app/data/xxx.out', 'rb'), 'application/octet-stream')},boundary='-----------------' + str(random.random()*1e9)
)
headers = {'content-type': 'multipart/form-data'}
r = requests.post(url, data=data, headers={'content-type': data.content_type})
print(r.text)

改进质量

/** Copyright (C) Igor Sysoev* Copyright (C) Nginx, Inc.*/#include <ngx_config.h>
#include <ngx_core.h>
#include <ngx_channel.h>ngx_int_t
ngx_write_channel(ngx_socket_t s, ngx_channel_t *ch, size_t size,ngx_log_t *log)
{ssize_t             n;ngx_err_t           err;struct iovec        iov[1];struct msghdr       msg;#if (NGX_HAVE_MSGHDR_MSG_CONTROL)union {struct cmsghdr  cm;char            space[CMSG_SPACE(sizeof(int))];} cmsg;if (ch->fd == -1) {msg.msg_control = NULL;msg.msg_controllen = 0;} else {msg.msg_control = (caddr_t) &cmsg;msg.msg_controllen = sizeof(cmsg);ngx_memzero(&cmsg, sizeof(cmsg));cmsg.cm.cmsg_len = CMSG_LEN(sizeof(int));cmsg.cm.cmsg_level = SOL_SOCKET;cmsg.cm.cmsg_type = SCM_RIGHTS;/** We have to use ngx_memcpy() instead of simple*   *(int *) CMSG_DATA(&cmsg.cm) = ch->fd;* because some gcc 4.4 with -O2/3/s optimization issues the warning:*   dereferencing type-punned pointer will break strict-aliasing rules** Fortunately, gcc with -O1 compiles this ngx_memcpy()* in the same simple assignment as in the code above*/ngx_memcpy(CMSG_DATA(&cmsg.cm), &ch->fd, sizeof(int));}msg.msg_flags = 0;#elseif (ch->fd == -1) {msg.msg_accrights = NULL;msg.msg_accrightslen = 0;} else {msg.msg_accrights = (caddr_t) &ch->fd;msg.msg_accrightslen = sizeof(int);}#endifiov[0].iov_base = (char *) ch;iov[0].iov_len = size;msg.msg_name = NULL;msg.msg_namelen = 0;msg.msg_iov = iov;msg.msg_iovlen = 1;n = sendmsg(s, &msg, 0);if (n == -1) {err = ngx_errno;if (err == NGX_EAGAIN) {return NGX_AGAIN;}ngx_log_error(NGX_LOG_ALERT, log, err, "sendmsg() failed");return NGX_ERROR;}return NGX_OK;
}ngx_int_t
ngx_read_channel(ngx_socket_t s, ngx_channel_t *ch, size_t size, ngx_log_t *log)
{ssize_t             n;ngx_err_t           err;struct iovec        iov[1];struct msghdr       msg;#if (NGX_HAVE_MSGHDR_MSG_CONTROL)union {struct cmsghdr  cm;char            space[CMSG_SPACE(sizeof(int))];} cmsg;
#elseint                 fd;
#endifiov[0].iov_base = (char *) ch;iov[0].iov_len = size;msg.msg_name = NULL;msg.msg_namelen = 0;msg.msg_iov = iov;msg.msg_iovlen = 1;#if (NGX_HAVE_MSGHDR_MSG_CONTROL)msg.msg_control = (caddr_t) &cmsg;msg.msg_controllen = sizeof(cmsg);
#elsemsg.msg_accrights = (caddr_t) &fd;msg.msg_accrightslen = sizeof(int);
#endifn = recvmsg(s, &msg, 0);if (n == -1) {err = ngx_errno;if (err == NGX_EAGAIN) {return NGX_AGAIN;}ngx_log_error(NGX_LOG_ALERT, log, err, "recvmsg() failed");return NGX_ERROR;}if (n == 0) {ngx_log_debug0(NGX_LOG_DEBUG_CORE, log, 0, "recvmsg() returned zero");return NGX_ERROR;}if ((size_t) n < sizeof(ngx_channel_t)) {ngx_log_error(NGX_LOG_ALERT, log, 0,"recvmsg() returned not enough data: %z", n);return NGX_ERROR;}#if (NGX_HAVE_MSGHDR_MSG_CONTROL)if (ch->command == NGX_CMD_OPEN_CHANNEL) {if (cmsg.cm.cmsg_len < (socklen_t) CMSG_LEN(sizeof(int))) {ngx_log_error(NGX_LOG_ALERT, log, 0,"recvmsg() returned too small ancillary data");return NGX_ERROR;}if (cmsg.cm.cmsg_level != SOL_SOCKET || cmsg.cm.cmsg_type != SCM_RIGHTS){ngx_log_error(NGX_LOG_ALERT, log, 0,"recvmsg() returned invalid ancillary data ""level %d or type %d",cmsg.cm.cmsg_level, cmsg.cm.cmsg_type);return NGX_ERROR;}/* ch->fd = *(int *) CMSG_DATA(&cmsg.cm); */ngx_memcpy(&ch->fd, CMSG_DATA(&cmsg.cm), sizeof(int));}if (msg.msg_flags & (MSG_TRUNC|MSG_CTRUNC)) {ngx_log_error(NGX_LOG_ALERT, log, 0,"recvmsg() truncated data");}#elseif (ch->command == NGX_CMD_OPEN_CHANNEL) {if (msg.msg_accrightslen != sizeof(int)) {ngx_log_error(NGX_LOG_ALERT, log, 0,"recvmsg() returned no ancillary data");return NGX_ERROR;}ch->fd = fd;}#endifreturn n;
}ngx_int_t
ngx_add_channel_event(ngx_cycle_t *cycle, ngx_fd_t fd, ngx_int_t event,ngx_event_handler_pt handler)
{ngx_event_t       *ev, *rev, *wev;ngx_connection_t  *c;c = ngx_get_connection(fd, cycle->log);if (c == NULL) {return NGX_ERROR;}c->pool = cycle->pool;rev = c->read;wev = c->write;rev->log = cycle->log;wev->log = cycle->log;rev->channel = 1;wev->channel = 1;ev = (event == NGX_READ_EVENT) ? rev : wev;ev->handler = handler;if (ngx_add_conn && (ngx_event_flags & NGX_USE_EPOLL_EVENT) == 0) {if (ngx_add_conn(c) == NGX_ERROR) {ngx_free_connection(c);return NGX_ERROR;}} else {if (ngx_add_event(ev, event, 0) == NGX_ERROR) {ngx_free_connection(c);return NGX_ERROR;}}return NGX_OK;
}void
ngx_close_channel(ngx_fd_t *fd, ngx_log_t *log)
{if (close(fd[0]) == -1) {ngx_log_error(NGX_LOG_ALERT, log, ngx_errno, "close() channel failed");}if (close(fd[1]) == -1) {ngx_log_error(NGX_LOG_ALERT, log, ngx_errno, "close() channel failed");}
}